PHY2054 - Fall 2005 Exam 1 and Key

# PHY2054 - Fall 2005 Exam 1 and Key - 77777 Instructor(s J.R...

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77777 77777 Instructor(s): J.R. Buchler, A. Korytov PHYSICS DEPARTMENT PHY 2054 1st Exam Fall, 2005 Name (print, last first): Signature: On my honor, I have neither given nor received unauthorized aid on this examination. YOUR TEST NUMBER IS THE 5-DIGIT NUMBER AT THE TOP OF EACH PAGE. (1) Code your test number on your answer sheet (use 76–80 for the 5-digit number) . Code your name on your answer sheet. DARKEN CIRCLES COMPLETELY . Code your UFID number on your answer sheet. (2) Print your name on this sheet and sign it also. (3) Do all scratch work anywhere on this exam that you like. Circle your answers on the test form. At the end of the test, this exam printout is to be turned in. No credit will be given without both answer sheet and printout with scratch work most questions demand. (4) Blacken the circle of your intended answer completely, using a #2 pencil or blue or black ink . Do not make any stray marks or some answers may be counted as incorrect. (5) The answers are rounded off. Choose the closest to exact. There is no penalty for guessing. (6) Hand in the answer sheet separately. Constants g = 9 . 80 m/s 2 e = 1 . 6 × 10 - 19 C 1 μ C = 10 - 6 C G = 6 . 67 × 10 - 11 Nm 2 /kg 2 m e = 9 . 11 × 10 - 31 kg 1nC = 10 - 9 C k E = 8 . 99 × 10 9 Nm 2 /C 2 m p = m n = 1 . 67 × 10 - 27 kg 1pC = 10 - 12 C ² 0 = 8 . 85 × 10 - 12 C 2 /N/m 2 c = 3 × 10 8 m/s 1. An unknown charge Q c sits at the center of a thin conducting shell of inner radius equal to 2 m. The shell carries a net charge of +3 μ C. Points P 1 and P 2 are located 1.0 m and 1.5 m, respectively from the center. If the electrical potential difference between points P 1 and P 2 is Δ V = V 2 - V 1 = 18 kV, you deduce that the charge Q c is equal to (1) - 6 μ C (2) 0 (3) +6 μ C (4) - 3 μ C (5) +9 μ C 2. An electron is fired at a speed of

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